York University

Published purpose

Astronauts need to know where they are relative to their spacecraft as they move about in microgravity. The Principal Investigator (PI) team’s previous experiments demonstrated that astronauts adapt quickly to the novel perceptual environment of the International Space Station (ISS) and can reliably estimate how far they have moved in a straight-line using vision alone. However, other experiments have demonstrated that the perception of self-rotation in microgravity may be disrupted. The PI team’s proposed experiment assesses how effectively an astronaut can keep track of their starting position (their “home-base”) after experiencing a combination of linear and rotational visual information indicating motion along a three-dimensional path typical of that experienced in the ISS. Motion will be experienced passively and participants will judge the distance travelled and the direction of home-base following the motion. Keeping track of one’s home-base is a critically important skill for emergency egress or efficient travel. Understanding errors made will suggest compensatory strategies.